Report skipped and included declarations

[johnfairh]

This adds a report to stdout about the number of declarations included/skipped in the docs, pretty much per #238, eg.

included 964 public or open symbols
skipped 189 private, fileprivate, or internal symbols (use `--min_acl` to see)

New users are still having acl problems with their first use of jazzy, maybe this will help some.

[jpsim]

Curious why you closed this @johnfairh, as this does seem pretty useful.

[johnfairh]

I panicked, basically 😆 -- I missed entirely that the specs master had moved on + thought I'd done something unintentionally. Continued in #811.

[jpsim]

I missed entirely that the specs master had moved on

Argh, this is my fault. I was in the process of updating the specs to use Xcode 8.3.2 and didn't expect CI to fail (#800). I was too optimistic and pushed the changes to specs master.

I should get CI to pass with those changes asap. I'll rebuild with your changes in #811 afterwards, so no need to update the specs there beyond what you've already done. Sorry for the trouble.

[johnfairh]

No worries!